code: def addDocHeader(self):
      self.addLine("---")
      self.addLine("docid: operators-catalog")
      self.addLine("title: Operators Catalog")
      self.addLine("layout: operators")
      self.addLine("permalink: /docs/operators-catalogue.html")
      self.addLine("---")
      self.addLine("* TOC")
      self.addLine("{:toc}")
  
imports: import argparse
  import os
  from caffe2.python.docs.formatter import Markdown
  from caffe2.python.docs.generator import OpDocGenerator, DocUploader
  from caffe2.python.docs.generator import OperatorDoc, OperatorEngine
label_desc: Use image node_id 2 for calling the GHMarkdown obj's underlying member method code with example usage: obj.addDocHeader() without return types